Thread bars

Cut two 170mm pieces of M10 thread bar.

Postscript / PDF / EPS / BIG png / DXF (qcad)

Drill the holes into the profiles and cut cuttings with metal saw as specified in the drawings.

Hammer treatment

Bang the U section (only the longer pieces) along the edges around the outer 10.5mm holes with a big hammer to bulge the edges and thus cancel out any convexity on the middle face of the U section.

Painting

Paint the steel sections: two layers of primer and two layers of top coat.

Removing paint

Remove the paint around the holes which are on long pieces and are not on the short pieces using emery paper. The holder will sit on it and the paint must not get between.

-ne